US3539676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing filaments and films of polymers of alkylene sulfides
Assignee: Celanese Corp
•
Filing: 1966-08-29
•
Granted: 1970-11-10
•
Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Walter J Polestak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:02
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/76; D01F6/765; C; C08; C08G; C08G75/00; C08G75/02; C08G75/06; C08G75/08; D01D; D01D5/00; D01D5/12; D01D5/24; D01D5/247
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |